content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * --------------
   * DialFrame.java
   * --------------
   * (C) Copyright 2006-2008, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 03-Nov-2006 : Version 1 (DG);
   *
   */
  
  package org.jfree.chart.plot.dial;
  
  import java.awt.Shape;
  import java.awt.geom.Rectangle2D;
  import java.io.Serializable;
  
  /**
   * A dial frame is the face plate for a dial plot - it is always drawn last.
   * JFreeChart includes a couple of implementations of this interface
   * ({@link StandardDialFrame} and {@link ArcDialFrame}).
   * <br><br>
   * Classes that implement this interface should be {@link Serializable},
   * otherwise chart serialization may fail.
   *
   * @since 1.0.7
   */
  public interface DialFrame extends DialLayer {
  
      /**
       * Returns the shape of the viewing window for the dial, or
       * <code>null</code> if the dial is completely open.  Other layers in the
       * plot will rely on their drawing to be clipped within this window.
       *
       * @param frame  the reference frame for the dial.
       *
       * @return The window.
       */
      public Shape getWindow(Rectangle2D frame);
  
  }
  